Blow-off mechanism.



PATENTED NOV. 1, 1904.

J. M. FAGAN.

BLOW-OFF MEGHANNM.

APPLICATION FILED JULY 11, 1904.

N0 MODEL.

INVENTOH WI TNE SSE S A TTOHNE Y8 UivrrEn STATE Patented November 1,1904.

JAMES MORRIS FAGAN, OF NEW YORK, N. Y.

BLOW-OFF MECHANISM.

PECIFICATI'ONforming part of Letters Patent No. 774,057, dated November1, 1904.

Application filed July 11,1904 Serial No. 216,052. (No modelfl To allwhom it may concern.-

Be it known that 1, Lines i IoRRIs FAGAN, a citizen of the UnitedStates, and a resident of the city of New York, borough of theBronx, inthe county and State of New York, have invented a new and ImprovedBlow-Off Mechanism, of which the following is a full, clear, and exactdescription.

This invention relates to improvements in blow-off mechanism or valvesfor steam-boilers, an object being to provide a blow-ofi of simple andnovel construction so arranged that a main valve when closed will besubmerged in clear water, thus reducing to a minimum the danger ofdestroying the valve by the action of scale and sediment, and, further,to so place the valve that scale will not adhere to it when the deviceis in operation.

Other objects of the invention will appear in the general description.

I will describe a blow-off mechanism embodying my invention and thenpoint out the novel features in the appended claims.

Reference is to be had to the accompanying drawings, forming a part ofthis specification, in which similar characters of reference indicatecorresponding parts in all the figures.

Figure 1 is a side elevation of a blow-ofi. mechanism embodying myinvention, showing the same as connected to a steam-boiler. Fig. 2 is asectional elevation of the device. Fig. 3 is a section on the line m ofFig. 2. Fig. at is a sectional elevation showing a modification, andFig. 5 is a side view showing another modification.

Referring first to the example of my improvement shown in Figs. 1, 2,and 3, 1 designates a depending casing divided centrally by a partition2, which at its lower end is spaced from the casing, and this partitionprovides for two water-legs 3 4 in the casing. The leg 3 may be termedthe inlet leg and the leg 4 the outlet leg. Communicating with the upperend of the leg 3 is a pipe 5, leading from the boiler, and extended fromthe upper end of the leg is an outlet 6,which communicates with a seweror other point of discharge.

Extended across the upper portion of the inlet-leg 3 is a diaphragmhaving a vertical wall 7, provided with a valve-seat 8, having a valve9, the stem of which extends outward through a suitable stuffing-box11,which is screwed into a wall of the casing and is of sufficient'sizeto permit the valve to be removed through the opening when necessary forrepairs or the like.

Arranged in the upper portion of the outlet-leg 4: is a diaphragm havinga vertical wall 12, provided with a valve-seat 13 for receiving a valve1 1, the stem 15 of which extends outward through a' stuffing-box 16. Itwill be seen that these valves 9and 1 L extend with their faces insubstantially vertical position, so that Water and sediment carriedtherewith may pass freely through the valve-seat openings without anymaterial portion of the sediment collecting on the valves or on theseats, thus not only prolonging the life of the valves, but making thempractically water-tight.

Communicating at its top and bottom with the outlet-leg 4 is a glasssight-tube 17,through which the condition of the water in the casing maybe observed.

In Fig. 4 the auxiliary valve 18 is designed to engage in an openingformed in a diaphragm 19, arranged between the upper end of the leg 4and the discharge-pipe 6, and in this instance the main valve 20 isarranged in a position similar to that of the valve 14. in the firstexample described. In both cases, however, the main valve is locatedbetween the outlet and the inlet.

In Fig. 5 the Water-legs are formed of a length of pipe 21 bent to asubstantially U shape, forming the inlet and outlet legs, and in theoutlet-leg are valves 22 23, similar to the valves 18 and 20.

In the operation the main valve is to be opened wide and the inflowregulated by the auxiliary valve. In shutting off the flow the auxiliaryvalve is closed and some of the dirt and scale may be caught between thevalve and its seat, which will not, however, cause sufficient leaking toprevent the operation of the device or never enough to prevent thesuspended matter in the water in the casing from settling to the lowerend of it, leaving the main valve in clear Water. As the valve and seatare clean and submerged in clear liquid, they will come togethertightly, insuring an absolutely tight joint. As before stated, theclearing of the water may be observed in the glass 17.

Having thus described my invention, I

claim as new and desire to secure by Letters 2. A blow-off for asteam-boiler, comprising a pair of water-legs communicating at the lowerend, a main valve, and an auxiliary valve, the said valves having theirfaces arranged in vertical planes.

3. A blov-ofi' for a steam-boiler, comprising vertically-disposedcommunicating waterlegs, the said communication being at the lower end,an inlet'pipe leading into one of 5 said legs, an outlet-pipe leadingfrom the other of said legs, a diaphragm in the upper portion of theinlet-leg and having a vertical portion provided with a valve-seat, avalve for engaging in said seat, a diaphragm at the upper portion ofsaid other leg and having a vertical portion provided with. avalve-seat, and a valve for engaging therein, the faces of said valvesbeing disposed vertically.

A blow-oil" for asteamboiler comprising a casing having a verticalpartition spaced. from the bottom of the casing and dividing said easinginto an inlet water-leg and an outlet water-leg, an auxiliary valvearranged at the upper portion of the inlet water-leg, a main valvearranged at the upper portion of the outlet water-leg, and a sight-tubecommunicating at its ends with said outlet-leg.

A blow-off for a steam-boiler, comprising a pair of water-legscommunicating at the lower end, a main valve, an auxiliary valve, thesaid valves having their faces arranged in vertical planes, and asight-tube communieating at its upper and lower ends with one of thewater-legs.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

JAMES MORRIS FAGAN.

l/Vi tn'esses:

CHRIsTAIN RINGWALD, J r., HARRY R'IGFFELT.

